linux-kernel - Re: [PATCH 2/3] scsi: ufs: qcom: Map devfreq OPP freq to UniPro Core Clock freq

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Message-ID: <42beadc3-4c90-4012-a019-dca2083d4c89@quicinc.com>
Date: Tue, 6 May 2025 12:07:01 +0800
From: Ziqi Chen <quic_ziqichen@...cinc.com>
To: Avri Altman <Avri.Altman@...disk.com>,
        "quic_cang@...cinc.com"
	<quic_cang@...cinc.com>,
        "bvanassche@....org" <bvanassche@....org>,
        "mani@...nel.org" <mani@...nel.org>,
        "beanhuo@...ron.com"
	<beanhuo@...ron.com>,
        "avri.altman@....com" <avri.altman@....com>,
        "junwoo80.lee@...sung.com" <junwoo80.lee@...sung.com>,
        "martin.petersen@...cle.com" <martin.petersen@...cle.com>,
        "quic_nguyenb@...cinc.com" <quic_nguyenb@...cinc.com>,
        "quic_nitirawa@...cinc.com" <quic_nitirawa@...cinc.com>,
        "quic_rampraka@...cinc.com" <quic_rampraka@...cinc.com>,
        "neil.armstrong@...aro.org" <neil.armstrong@...aro.org>,
        "luca.weiss@...rphone.com" <luca.weiss@...rphone.com>,
        "konrad.dybcio@....qualcomm.com" <konrad.dybcio@....qualcomm.com>
CC: "linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "Manivannan
 Sadhasivam" <manivannan.sadhasivam@...aro.org>,
        "James E.J. Bottomley"
	<James.Bottomley@...senPartnership.com>,
        open list
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/3] scsi: ufs: qcom: Map devfreq OPP freq to UniPro Core
 Clock freq


Hi Avri,

On 5/2/2025 1:13 PM, Avri Altman wrote:
>> +			cycles_in_1us = ceil(clk_freq, HZ_PER_MHZ);
> Does ceil() is in fact DIV_ROUND_UP?
>
Yes , Both of these macro definitions, ceil(freq, div) and
DIV_ROUND_UP(n, d), are used to implement the function of rounding up
upwards by different implementation methods.

Ziqi,

> Thanks,
> Avri